Research Interests
Last update :
Network Architecture for Mobile Computing
I major in Computer Networks, and Operating Systems.
I am most interested in "Mobile Computing".
In the current Internet architecture, a node uses IP address for
communications and authentications. IP address, however, does not identify
the node itself, but indicates the current location of the node.
Therefore, it is difficult to provide
migration transparency
because IP address changes when the node migrates to another subnet.
Some methods have been proposed to support migration transpency.
To provide migration tranparency, these methods introduce new address
for node identifier, and still use IP address for node locator in Internet
where node migration is not premised.
This approach is better at the view of backward compatibility, but is not
suitable for future internetworking where node migrates without any
restriction.
so we reconstruct network architecture itself on the assumption
that node migrates, and propose Mobility-Oriented
Network Architecture,
which features are:
-
using Mobility-Oriented Address
as new addressing scheme instead
of IP address. This scheme separates address into ``network prefix'' which
specifies the subnet to which a node is connected and ``node identifier''
which identifies a node itself no matter where it is connected.
-
using the node identifier in mobility-oriented address at transport
and application layers for providing migration transparency.
-
and separating network layer into mapping and forwarding sublayers:
-
the mapping sublayer combines the node identifier with network prefix,
and forms mobility-oriented address.
-
and the forwarding sublayer routes basing on the mobility-oriented
address.
We implement the prototype of Mobility-Oriented Network Architecture
on IPv6, evaluate the performance by measuring the basic actions (packet
sending, forwarding, and receiving) in this prototype, and show that
we accomplish with the slight overhead compared with the existing Internet
architecture.
In the future, we believe that mobile computing will deploy more widely and
variously. Mobility-Oriented Network Architecture we propose here shows
a guideline for it.
I research with Dr.
Fumio Teraoka ( Sony CSL ).
Also, I am the member of
WIDE Project,
AMInet Project
Papers
-
Kazuhiro Shitama, Fumio Teraoka,
"Design and Implementation of Mobility Oriented Network Architecture"(In Japanese),
Transactions of IPSJ, Vol.41, No.07, IPSJ, July, 2000.
[Postscript(In Japanese)]
-
Kazuhiro Shitama, Fumio Teraoka,
"Design and Implementation of Mobility Oriented Network Architecture"(In Japanese),
The 9th MBL(MoBiLe computing workshop), IPSJ, May, 1999.
[Postscript(In Japanese)]
-
Kazuhiro Shitama, "A study on Network Architecture for Mobile Computing"(In Japanese),
Master thesis, Keio University, February, 1999.
-
Kazuhiro Shitama, Fumio Teraoka,
"Design and Implementation of v6VIP"(In Japanese),
DICOMO'98 Symposium, IPSJ, July, 1998.
[Postscript(In Japanese)]
-
Kazuhiro Shitama, Fumio Teraoka,
"Providing Host Migration Transparency in IPv6 "(In Japanese),
The 5th MBL(MoBiLe computing workshop), IPSJ, March, 1998.
[Postscript(In Japanese)]
-
Kazuhiro Shitama, Fumio Teraoka, "The Design and Implementation of VIPv4"(In
Japanese),
The 14th Conference Proceedings, JSSST, October, 1997.
[Postscript(In Japanese)]
-
Kazuhiro Shitama, "Sarchie: a Resource Search Protocol based on Distance to Resource"(In Japanese),
bachelor thesis, Keio University, February, 1997.
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shitama@tokoro-lab.org